/*

 * LIBOIL - Library of Optimized Inner Loops

 * Copyright (c) 2001,2003,2004 David A. Schleef <ds@schleef.org>

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,

 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 */

//Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <liboil/liboilfunction.h>

#include "conv.h"

#include <math.h>

static void

conv_f64_s16_table(double *dest, int dest_stride, const short *src,

	int src_stride, int n)

{

	static double ints_high[256];

	static double ints_low[256];

	static int init = 0;

	int i;

	unsigned int idx;

	if(!init){

		for(i=0;i<256;i++){

			ints_high[i]=256.0*((i<128)?i:i-256);

			ints_low[i]=i;

		}

		init = 1;

	}

	if(n&1){

		idx = (unsigned short)*src;

		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];

		OIL_INCREMENT(dest, dest_stride);

		OIL_INCREMENT(src, src_stride);

		n-=1;

	}

	for(i=0;i<n;i+=2){

		idx = (unsigned short)*src;

		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];

		OIL_INCREMENT(dest, dest_stride);

		OIL_INCREMENT(src, src_stride);

		idx = (unsigned short)*src;

		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];

		OIL_INCREMENT(dest, dest_stride);

		OIL_INCREMENT(src, src_stride);

	}

}

OIL_DEFINE_IMPL(conv_f64_s16_table, conv_f64_s16);

static void

conv_f32_s16_table(float *dest, int dest_stride, const short *src,

	int src_stride, int n)

{

	static float ints_high[256];

	static float ints_low[256];

	static int init = 0;

	int i;

	unsigned int idx;

	if(!init){

		for(i=0;i<256;i++){

			ints_high[i]=256.0*((i<128)?i:i-256);

			ints_low[i]=i;

		}

		init = 1;

	}

	if(n&1){

		idx = (unsigned short)*src;

		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];

		OIL_INCREMENT(dest, dest_stride);

		OIL_INCREMENT(src, src_stride);

		n-=1;

	}

	for(i=0;i<n;i+=2){

		idx = (unsigned short)*src;

		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];

		OIL_INCREMENT(dest, dest_stride);

		OIL_INCREMENT(src, src_stride);

		idx = (unsigned short)*src;

		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];

		OIL_INCREMENT(dest, dest_stride);

		OIL_INCREMENT(src, src_stride);

	}

}

OIL_DEFINE_IMPL(conv_f32_s16_table, conv_f32_s16);

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_conv_f64_s16_table() {

		return &_oil_function_impl_conv_f64_s16_table;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_conv_f32_s16_table() {

		return &_oil_function_impl_conv_f32_s16_table;

}

#endif